EP0804995B1 - Werkzeug zum Montieren von Statorsegmenten einer Turbomaschine - Google Patents

Werkzeug zum Montieren von Statorsegmenten einer Turbomaschine Download PDF

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Publication number
EP0804995B1
EP0804995B1 EP97400974A EP97400974A EP0804995B1 EP 0804995 B1 EP0804995 B1 EP 0804995B1 EP 97400974 A EP97400974 A EP 97400974A EP 97400974 A EP97400974 A EP 97400974A EP 0804995 B1 EP0804995 B1 EP 0804995B1
Authority
EP
European Patent Office
Prior art keywords
casing
sectors
circular plate
tooling according
sector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97400974A
Other languages
English (en)
French (fr)
Other versions
EP0804995A1 (de
Inventor
Jacques Georges Philippe Guerin
Pierre Ange Jean Antoine Trecan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA Moteurs SA
SNECMA SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SNECMA Moteurs SA, SNECMA SAS filed Critical SNECMA Moteurs SA
Publication of EP0804995A1 publication Critical patent/EP0804995A1/de
Application granted granted Critical
Publication of EP0804995B1 publication Critical patent/EP0804995B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53978—Means to assemble or disassemble including means to relatively position plural work parts

Definitions

  • the invention relates to a tool for mounting of a turbomachine distributor.
  • Turbomachine distributors are arrangements in a circle of fixed vanes arranged in front blades linked to the rotor, especially in turbines with low pressure, and whose function is to ensure a proper recovery of gas flow from engine to increase the output of it.
  • the origin of the invention is to be attached to creating a particular form of sectors of distributor: their radially outer edge is provided on one side of a circular projection extending in axial direction, and on the other side of a projection circular extending in radial direction; these projections, called spoilers, are intended to ensure the fitting of the distributor sectors in the housing the turbomachine, which is provided for this with a lip axial against which the first spoiler leans and a radial lip against which the second leans spoiler.
  • the invention relates to a tool which be able to climb without difficulty this kind of sectors distributor in their crankcase locations turbomachine after entering them; he can too used to disassemble this dispenser by operations inverses, as it will obviously become in the following of this talk.
  • the suspension mechanism includes a pair of connecting rods articulated to the sector support; one of the connecting rods is also articulated on the plate and the other of the connecting rods is also articulated to an organ, common to all mounting units, control mechanism failover.
  • a particularly control mechanism simple for tilting includes a nut screwed on a threaded axis of the plate, and a crown rotating in the nut around the threaded axis: this crown is not other than the aforementioned joint body.
  • the tools can include a plan for this on which the housing is placed and on which the plate is suspended by a lowering mechanism, which may consist in a second nut screwed on the threaded axis and placed on a base mandrel, the axis sliding along the mandrel with a rotation stop link.
  • the suspension of the sector supports must be flexible during the introduction of the protrusions sectors in the dwellings delimited by the lips of the casing but that flexibility isn't really favorable before, especially when the sectors previously stored must be entered by supports, and that's why it's advantageous to add a joint inhibition mechanism, which can be released, which connects the connecting rods to the circular plate articulated to it and immobilizes them temporarily.
  • a simple design for this inhibition mechanism hinge is a detent and recoil mechanism that imposes a tilting of the connecting rods radially towards inside when released by the action of a spring for example.
  • the tool may include a laying plan distributor areas according to a provision substantially identical to their mounting arrangement in the housing: this allows manual assembly the distributor before taking its segments by the mounting units.
  • the tools can also facilitate the mounting the rotor wheels behind the distributors, once these have been fitted: these elements, such as a retaining ring, whose effect is to retain the sealing rings placed in the casing near the distributor and which extend around the rotor wheel; this eliminates any risk that these sealing rings do not move during wheel insertion.
  • a preliminary step to the installation of the retaining ring can be performed if runners, movable in the radial direction, are provided on the tools and arranged so that press the sealing rings on the housing, before that the mounting units do not release the sectors of distributor and the tools are not removed.
  • FIG. 7 A longitudinal half-section of a turbine of a turbomachine is shown in FIG. 7: a low pressure turbine casing 1 of a turbomachine tapers forwards, i.e. here to the left of the figure, and flourishes towards the rear, on the right; it contains a rotor 2, and rotor wheels 3 formed of a circle of trigger vanes alternate with fixed distributors 4 in the annular vein 5 intermediate between the casing 1 and the rotor 2.
  • the seal at the rotor wheels 3 is ensured by segments in an arc of matter called abradable 6, that is to say of easy erosion and which can be dug by ridges called wipers 7 circular shaped established at the end of the rotor wheels 3, which reach the abradable 6 and dig it to normal service conditions, when overheating larger rotor 2 produced deformations higher thermal values. There remains only one very narrow clearance between wipers 7 and abradable 6.
  • Distributors 4 are made up of sectors 8 adjacent, each spanning a fraction of circumference and are all identical: we will be especially interested in their foot 9, that is to say their part of union to casing 1 and on which we can distinguish several important elements, using also in Figure 6.
  • a first spoiler 10 constitutes a projection axially oriented and directed towards the tapered side of the casing 1 when the assembly is carried out; he enters a first housing 11 of the casing 1, delimited by a outer skin 12 thereof and by an axial lip 13, directed towards the open side; this axial lip has a diameter immediately smaller than that of the first spoiler 10 to allow it to lean on it.
  • a second spoiler 14, located on the open side of the casing 1 at mounting time, is directed radially towards the exterior, and it is supported by a lateral surface 15 located towards the open side of the housing 1 against a radial lip 16 extending inwardly from this one.
  • each abradable layer 6 is provided with a staple 22 at its front end and which opens towards the front, to trap the second lip 16 and cover it completely, as well as a rear end portion 23 of the second spoiler 14, which is then retained against inward radial movements.
  • a heat shield 24 is embedded in the second spoiler 14 and extends around foot 9 of sector 8 up to the first spoiler 10; its end free 25 touches the skin 12 of the casing 1.
  • the foot 9 also includes a ring of link 26 which connects the spoilers 10 and 17 from before to rear spoiler 14 and carries the vanes 27; as sealing must be restored between sectors 8 adjacent, grooves are provided on the faces side of feet 9, along the connecting ring 26 and the first and second spoilers 10 and 14, in which we introduce edges of plates sealing 28 which cover the interstices of 8 adjacent sectors.
  • the ring of free end link 29 also carries a layer abradable 31 rubbed down wipers 32 belonging to rotor 2.
  • the most delicate part of the assembly therefore consists in respectively introducing the first and the second spoilers 10 and 14 in the housing 11 and a housing 33 delimited by the second lip 16 and the circular reach 20, which is not possible with a purely axial movement in the casing 1 because the second lip 16 surrounds an opening of diameter less than the external diameter of the second spoiler 14, at the exterior surface 19.
  • all sectors 8 in arc must be mounted at the same time under penalty tear off the sealing plates 28 and 30 from their groove; and you have to take into account the presence of stop pins 34 in rotation (FIG.
  • the tools with which this problem of assembly is solved first includes a plan of mounting 40 of the distributor 4, shown in FIG. 1, - outside the casing 1.
  • This assembly plane 40 is circular and illustrated in half-section; it includes two crowns concentric 41 and 42 screwed onto a disc 46; the sectors 8 are placed on the first ring 41 by their free end link ring 29 and on the second crown 42 by foot 9, and more precisely by the third spoiler 17 and by the first spoiler 10; the latter engages in a groove 43 dug in the second crown 42, which places the sectors 8 to the correct inclination for mounting, and in a reciprocal arrangement similar to that which they take once mounted in the housing 1.
  • the inserts sealing 28 and 30 are slid into the grooves at the side edges of sectors 8 and held in place with slight adhesion by grease; wedges not shown can be slid between the 8 adjacent sectors to keep them apart desired.
  • the disc 46 is linked to a mandrel 44 which rises in the center of it and around which we thread the main tool 50 which will now be describes, first of all from figure 2.
  • This tool main 50 mainly consists of a plate 51 circular in the center of which rises a threaded axis 52 and which carries around it a series of mounting units 53 sectors 8, identical in number to these.
  • the axis threaded 52 is hollow and it is it which is threaded around of the mandrel 44, until the latter abuts against the inner ring of a ball bearing 54 arranged in a lowering nut 55 screwed to the top of the threaded axis 52.
  • the outer ring of the ball bearing 54 is fixed to the buck nut 55.
  • the rotation of the lowering nut 55 in the desired direction drives lowering the threaded shaft 52 and the mounting 53 to sectors 8 of distributor 4: this is precisely what is being done to capture these sectors 8, the main tool 50 arriving at the position sketched in figure 1.
  • the mounting units 53 include a sector support 58 in the form of tray and provided with an upper rib 59 to which are articulated a lifting rod 60 and a connecting rod back 61 by which the support 58 is suspended to the circular plate 51 and its position is controlled.
  • each lifting rod 60 is articulated by its opposite end and greater than a crown 92 engaged in a tilting nut 93 screwed as the lowering nut 55 to the threaded axis 52; crown 92 is housed in the tilting nut 93 by through skates and needle bearings 94 which allow it to be independent in rotation of it: when the tilting nut 93 is turned, it rises or falls and drives the crown 92 without it spinning; the lifting rods 60 are driven, causing the supports to tip over 58.
  • the recoil rod 61 is directly articulated to the circular plate 51 by its end superior; it is moreover united to it by a mechanism rotation inhibition 62 (visible especially at Figure 4) which mainly comprises a rod 63 which passes through the recoil link 61 and an elongated slot 64 established through an ear 65 forming a protrusion under the circular plate 51.
  • a spring 66 is compressed between a shoulder 67 of the rod 63 and the ear 65 and tends to drive the rod 63 radially towards the inside. However, this movement is stopped by a stop 68 of the rod 63, which carries a knife 69 elongate.
  • the main tool 50 is raised from the mandrel 44 of the assembly plane 40 and carried to another part of the tool, namely a base 80 (illustrated in Figure 2) composed of a second disc 81 on which the casing 1 is placed and a second mandrel 83 erected in the center of the disc 81 and on which the threaded axis 52 of the main tool 50 is threaded, until the top of the second mandrel 83 abuts against the inner ring of the bearing 54, as previously.
  • a base 80 illustrated in Figure 2 composed of a second disc 81 on which the casing 1 is placed and a second mandrel 83 erected in the center of the disc 81 and on which the threaded axis 52 of the main tool 50 is threaded, until the top of the second mandrel 83 abuts against the inner ring of the bearing 54, as previously.
  • the casing 1 is placed by its end tapered front on bearing and centering surfaces 82 of the second disc 81, so that its axis is vertical and that the distributor mounting groove 84 4, essentially delimited by the lips 13 and 16 opens up. Like the circular plate 51 is then raised, the distributor 4 overhangs the groove 84.
  • the assembly of sectors 8 involves then descend the circular plate 51 and the units mounting 53 by a rotation exerted on the nut step 55, not without first having lowered the tilting nut 93 to inflict a slight tilt (the radially inner edge of sectors 8 being lowered) to sectors 8 of distributor 4, by 6 ° for example.
  • the rods 63 were turned by one quarter turn to release the inhibition mechanisms of articulation 62: the knives 69 align with the slots 64, and enter them under the action of springs 66 which relax: the recoil links 61 undergo a tilting inwards (radially) which makes move back the supports 58 and accentuate their inclination.
  • the tilting nut 63 is then raised along the threaded axis 51, which causes the pivoting of the sectors 8 around the first spoiler 10 and brings the second spoilers 14 closer to the second lips 16 until the surfaces are adjusted radially 19 on the circular span 20 or realized, what we sketched on the left half view of figure 2. It is then possible to install the abradable layer 6 located immediately behind and to block the distributor 4 by clip 22 (figure 4). In addition, a retaining ring 86 can be installed temporarily around the rear end 18 of this abradable layer 6 to maintain it temporarily in place, until the wheel rotor 3 located in front of said layer 6 is mounted, then that the tools responsible for setting up the following distributor 4 is introduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Control Of Turbines (AREA)

Claims (10)

  1. Werkzeug (40, 50, 80) zum Montieren eines von kreisbogenförmig aneinandergrenzenden Segmenten (8) gebildeten Leitrades (4) einer Turbomaschine in einem Gehäuse (1), das mit zwei ringförmigen Aufnahmen (11, 33) versehen ist, wobei eine erste Aufnahme (11), die sich auf einer sich verjüngenden Seite des Gehäuses (1) befindet, durch eine erste Lippe (13) des Gehäuses umgrenzt wird, die sich gegenüber der sich verjüngenden Seite axial erstreckt, wobei eine zweite Aufnahme (33), die sich auf einer ausgebauchten Seite des Gehäuses befindet, durch eine zweite Lippe (16) des Gehäuses umgrenzt wird, die sich radial nach innen erstreckt, wobei die Segmente (8) an einem radial außen liegenden Abschnitt eine erste Nase (10) aufweisen, die in der erste Aufnahme (11) in Eingriff kommt und sich axial zu der sich verjüngenden Seite hin erstreckt, wenn das Leitrad in dem Gehäuse eingebaut ist, und eine zweite Nase (14) aufweisen, die mit der zweiten Aufnahme (33) in Eingriff kommt und sich radial nach außen erstreckt, wenn das Leitrad in dem Gehäuse eingebaut ist,
       gekennzeichnet durch:
    eine kreisförmige Platte (51),
    Montageeinheiten (53) für die Segmente, die mit den Segmenten (8) des Leitrades verbunden sind und jeweils aufweisen:
    einen Segment-Träger(58),
    einen Aufhängungsmechanismus (60, 61) für den Segment-Träger an der kreisförmigen Platte, und
    einen Steuermechanismus zum Kippen (92, 93) des Segment-Trägers, der zwischen dem Segment-Träger und der kreisförmigen Platte angeordnet ist und mit dem das von dem Träger gehaltene Segment (8) geneigt werden kann.
  2. Werkzeug nach Anspruch 1,
       dadurch gekennzeichnet,    dass der Aufhängungsmechanismus ein Paar Stangen umfasst, die an dem Segment-Träger angelenkt sind, wobei die eine dieser Stangen (61) außerdem an der kreisförmigen Platte (51) angelenkt ist, und die andere Stange (60) außerdem an einem Organ (92) des Steuermechanismus zum Kippen angelenkt ist, das allen Montageeinheiten gemeinsam ist.
  3. Werkzeug nach Anspruch 2,
       dadurch gekennzeichnet,    dass der Steuermechanismus zum Kippen aus einer auf eine Gewindeachse (52) der kreisförmigen Platte (51) aufgeschraubten Mutter (93) und einem in der Mutter (93) um die Gewindeachse drehenden Kranz (92) besteht, welcher das genannte Organ bildet.
  4. Werkzeug nach einem der Ansprüche 1 bis 3,
       dadurch gekennzeichnet,    dass es eine Ebene (80) aufweist, auf die das Gehäuse gesetzt wird und an der die kreisförmige Platte (51) mit einem Absenkmechanismus (55) aufgehängt ist.
  5. Werkzeug nach den Ansprüchen 3 und 4,
       dadurch gekennzeichnet,    dass der Absenkmechanismus (55) aus einer zweiten Mutter besteht, die auf die Gewindeachse (52) aufgeschraubt ist und auf einer Kernstange (83) des Sockels (80) sitzt, wobei die Achse entlang der Kernstange verschiebbar ist.
  6. Werkzeug nach Anspruch 2,
       dadurch gekennzeichnet,    dass die an der kreisförmigen Platte (51) angelenkten Stangen (61) auch durch einen lösbaren Gelenksperrmechanismus (62) mit der kreisförmigen Platte (51) verbunden sind.
  7. Werkzeug nach Anspruch 6,
       dadurch gekennzeichnet,    dass der Gelenksperrmechanismus (62) ein Mechanismus mit Auffederung und Zurückspringen ist, der ein Kippen der Stangen (61) in radialer Richtung nach innen bewirkt, wenn er freigegeben wird.
  8. Werkzeug nach einem der Ansprüche 1 bis 7,
       dadurch gekennzeichnet,    dass es einen Rückhaltering (86) für Dichtungssegmente (6) aufweist, die in dem Gehäuse nahe bei dem Leitrad und um ein Rotorrad (3) herum angeordnet sind.
  9. Werkzeug nach Anspruch 8,
       dadurch gekennzeichnet,    dass es Gleitschuhe (87) aufweist, die in radialer Richtung beweglich sind, um die Dichtungssegmente (6) an das Gehäuse (1) zu pressen.
  10. Werkzeug nach einem der Ansprüche 1 bis 9,
       dadurch gekennzeichnet,    dass es eine Montageebene (40) aufweist, auf der die Segmente (8) des Leitrades in einer Anordnung angebracht werden, die im wesentlichen identisch mit ihrer Einbau-Anordnung in dem Gehäuse (1) ist.
EP97400974A 1996-05-02 1997-04-30 Werkzeug zum Montieren von Statorsegmenten einer Turbomaschine Expired - Lifetime EP0804995B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9605486 1996-05-02
FR9605486A FR2748224B1 (fr) 1996-05-02 1996-05-02 Outillage de montage d'un distributeur de turbomachine

Publications (2)

Publication Number Publication Date
EP0804995A1 EP0804995A1 (de) 1997-11-05
EP0804995B1 true EP0804995B1 (de) 2002-06-05

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EP97400974A Expired - Lifetime EP0804995B1 (de) 1996-05-02 1997-04-30 Werkzeug zum Montieren von Statorsegmenten einer Turbomaschine

Country Status (5)

Country Link
US (1) US5918356A (de)
EP (1) EP0804995B1 (de)
CA (1) CA2204099C (de)
DE (1) DE69712978T2 (de)
FR (1) FR2748224B1 (de)

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EP3024729B1 (de) 2013-07-26 2022-04-27 MRA Systems, LLC Triebwerkspylon für luftfahrzeug
CN104476166B (zh) * 2014-11-14 2016-08-24 沈阳黎明航空发动机(集团)有限责任公司 一种双环压紧设备
CN108098673A (zh) * 2017-12-11 2018-06-01 中国航发沈阳发动机研究所 低压涡轮叶片挡板装拆装置
CN109600003B (zh) * 2018-12-18 2020-11-06 中国航发沈阳发动机研究所 发动机转子叶片拆装设备
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CN116175990B (zh) * 2023-04-24 2023-07-11 国营川西机器厂 一组用于解决航空发动机加分薄膜漏油故障的装置及方法
CN117226498B (zh) * 2023-09-11 2025-10-24 中国科学院沈阳自动化研究所 一种用于航空发动机大部件对接的装配系统
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CN104440761B (zh) * 2014-09-29 2016-04-27 沈阳黎明航空发动机(集团)有限责任公司 一种转子双环压紧装配设备及方法

Also Published As

Publication number Publication date
CA2204099C (en) 2004-11-09
US5918356A (en) 1999-07-06
FR2748224B1 (fr) 1998-06-19
CA2204099A1 (en) 1997-11-02
DE69712978T2 (de) 2003-01-23
DE69712978D1 (de) 2002-07-11
FR2748224A1 (fr) 1997-11-07
EP0804995A1 (de) 1997-11-05

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